Emperor Temmu was the 40th emperor of Japan, reigning from 673 to 686 AD. He is known for his efforts to strengthen the imperial authority and centralize the government. His reign marked a significant period in the development of the Japanese state, as he implemented various reforms that laid the groundwork for future governance. During his rule, Emperor Temmu also promoted the adoption of Buddhism and supported the construction of temples. He is often associated with the Taika Reforms, which aimed to modernize the political structure of Japan. His legacy includes a focus on administrative efficiency and the enhancement of the emperor's role in society.